JPH0825590A - Color film - Google Patents

Abstract

PURPOSE:To obtain a clear design with enhancement of a coloring performance of a dye by a method wherein in a marking film mainly composed of a transparent PVC and containing a coloring agent, when a dye is used as the coloring agent, the case that the migration of the dye causes the marking film to look in appearance as if the marking film discolors per se is prevented from occurring. CONSTITUTION:On one surface of a film substrate 1 composed of a transparent PVC and containing a dye as a coloring agent, an adhesive layer 2 is formed. On the other surface thereof, a printing layer 3 is provided. At this time, dye migration-preventing layers 4, 4 mainly composed of PVDC are respectively provided on both surfaces of the film substrate 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent polyvinyl chloride resin (hereinafter referred to as PVC) such as marking films, stickers, colored tapes, display tapes and display sheets.
(Hereinafter referred to as)) containing a coloring agent, and particularly to measures for improving the coloring power.

[0002]

2. Description of the Related Art In recent years, for example, when displaying characters, designs, etc. on an outdoor signboard, instead of painting with a paint that needs to be repainted in 2-3 years due to weather resistance deterioration, 5-7
It has been practiced to use marking films that have a weather resistance of one year.

The marking film is generally made of transparent PVC as a main component and contains a coloring agent, and is cut and attached in a shape for displaying a predetermined character or pattern. Therefore, it is also called "paste paint". In other words, if this marking film is used, anyone can easily obtain the same display effect as the painting performed by a skilled craftsman, and the weather resistance is 2
More than double.

By the way, in the conventional marking film, a pigment is used as a coloring agent, but if a dye is used as the coloring agent instead of this pigment, the coloring power is further improved and the design is more vivid. You can expect to be able to acquire the sex.

[0005]

On the other hand, on the other hand, since the dye has a smaller molecular weight than the pigment and has a small polarity, it has a strong migration property in PVC. Therefore, as described above, when it is used as a coloring agent for a marking film, there is a problem that the dye in the marking film easily migrates to a member in contact with the marking film with time.

For this reason, for example, when the marking film has an adhesive layer or a print layer on the surface of the film substrate, the dye in the film substrate is attached to the adhesive layer or the print layer, respectively. It will migrate and cause discoloration of those layers.

When the above-mentioned discoloration occurs,
Since the marking film itself will have a discolored appearance, the inclusion of a dye has the opposite effect of reducing the designability.

The present invention has been made in view of the above problems, and an object thereof is to provide a coloring film such as a marking film containing transparent PVC as a main component and containing a coloring agent as a coloring agent. When a dye is used, it is possible to suppress the migration of the dye, thereby improving the coloring power of the dye and effectively realizing a vivid design property.

[0009]

In order to achieve the above object, in the invention of claim 1, a polyvinylidene chloride resin known to be capable of preventing migration of a plasticizer in PVC (for example, Japanese Utility Model Application No. 60). No. 93916 [Shokai Sho 62-3
No. 725], the inventors of the present invention have found that a dye transfer preventing layer made of this polyvinylidene chloride resin (hereinafter referred to as PVDC) is used as a film base. By providing it on the surface of the material, the dye can be contained without deteriorating the design.

Specifically, in the present invention, a film base material containing a transparent PVC as a main component and containing a dye, and at least one of both surfaces of the film base material are provided, and PVDC And a dye transfer prevention layer containing as a main component.

According to a second aspect of the present invention, in the above-mentioned first aspect, the dye transfer prevention layer is provided on one surface of the film substrate. Then, an adhesive layer is provided on the surface of the dye transfer prevention layer opposite to the film substrate.

A colored film characterized in that:

According to a third aspect of the present invention, in the above-mentioned first aspect, the dye transfer prevention layer is provided on both surfaces of the film substrate. An adhesive layer is provided on the surface of the one dye transfer prevention layer opposite to the film substrate, and a print layer is provided on the surface of the other dye transfer prevention layer opposite to the film base. To do so.

In the invention of claim 4, the above-mentioned claim 2 or 3
In the invention described above, a separator is attached to the surface of the adhesive layer opposite to the dye transfer prevention layer.

[0015]

With the above structure, in the invention of claim 1, since the dye transfer prevention layer containing PVDC as a main component is disposed on at least one of both surfaces of the film substrate, the surface on the side where the prevention layer is present. Even if the dye in the dye film base material tries to migrate to the outside, the migration of the dye is suppressed by PVDC of the dye migration preventing layer. This prevents discoloration of the member in contact with the surface side of the film substrate,
This avoids the deterioration of the design of the colored film due to the discoloration. Therefore, a dye can be used as a colorant in place of a conventional pigment, the coloring power of the dye can be improved, and a vivid design property can be obtained.

According to the second aspect of the present invention, the colored film is attached to a predetermined portion of the adhesive layer. At this time, since the adhesive layer is provided on the surface opposite to the film base in the dye transfer prevention layer on one surface of the film base, the dye in the film base is When the dye transfer prevention layer is located between the film base material and the adhesive layer, the transfer of the dye to the adhesive layer is suppressed. This prevents discoloration of the adhesive layer due to the dye, so
The action of the invention is specifically carried out.

According to the invention of claim 3, in addition to the function of the invention of claim 2, the print layer is a surface of the dye transfer preventing layer on the other surface of the film substrate, which is opposite to the film substrate. Therefore, even if the dye in the film substrate tries to migrate to the print layer, the dye migration preventive layer is located between the film substrate and the print layer, so that the dye can be transferred to the print layer. Can be suppressed.
As a result, the discoloration of the adhesive layer and the print layer due to the dye is prevented, so that the action of the invention according to the above-mentioned claim 1 can be realized.

In the invention of claim 4, a separator is attached to the surface of the adhesive layer opposite to the dye transfer preventing layer, and the separator is peeled from the adhesive layer when the colored film is attached. Therefore, since the adhesive layer is protected by the separator until the colored film is attached, it is possible to prevent foreign matter such as dust from adhering to the adhesive layer and lowering its adhesive strength. Further, the colored film can be prevented from being inadvertently attached to another colored film or the like in the adhesive layer, so that the colored film can be easily handled. In particular, since the colored film can be cut with the separator attached to the adhesive layer, the cutting operation can be facilitated.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows the structure of a marking film according to an embodiment. The marking film is, for example, a letter or the like on an outdoor advertising tower or a guide display board, and a stripe pattern or the like on the vehicle body surface of a car such as an automobile or a train. Are used to display the respective forms.

The marking film has, as a basic structure, a film base material 1 which is composed mainly of transparent PVC (polyvinyl chloride resin) and contains a dye as a colorant. An adhesive layer 2 as an adhesive layer for adhering the film substrate 1 to a predetermined location S is provided on one surface side (the lower side in the same figure), and on the other surface side (the upper side in the same figure). Are provided with print layers 3, respectively. Further, the film substrate 1 of the adhesive layer 2
A release paper as a separator (not shown) is releasably attached to the surface on the side opposite to (the lower surface in the figure), and when the marking film is attached to the predetermined position S, the release paper is removed from the adhesive layer 2. It is designed to peel off.

The hardness and thickness of the above marking film are not particularly limited, but assuming that the marking film is generally used, the hardness of the film substrate 1 is 100 parts by weight of PVC and dioctyl phthalate ( Hereinafter, about 30 parts by weight of a plasticizer such as DOP) is preferably kneaded. The thickness of the film substrate 1 may be in the range of 10 to 200 μm, preferably 50 to 60 μm.

As a feature of the present invention, dye transfer preventing layers 4 and 4 made of PVDC (polyvinylidene chloride resin) are provided on both surfaces of the film substrate 1, respectively, and the adhesive layer 2 and The print layer 3 is provided on the surface of each dye transfer prevention layer 4 opposite to the film substrate 1. Here, each of the dye transfer prevention layers 4 is made of P
It is formed by adhering the VDC film to the surface of the film substrate 1 via the adhesive layer 5. In the case of a marking film, the range of the layer thickness of each dye transfer prevention layer 4 may be 1 to 80 μm, and preferably 30 to 40 μm.
m. Since the hardness of the dye transfer prevention layer 4 is determined by its layer thickness, the hardness may be adjusted by adjusting the layer thickness.

Next, a method of using the marking film having the above structure will be described. First, the marking film is cut into a predetermined shape while the release paper is still attached. The cutting method is carried out by using a computer-controlled cutting machine and inputting a predetermined shape into the computer. After that, the release paper is peeled off while being positioned with respect to the predetermined position S at the sticking site, and the surface on the print layer 3 side is pressed and bonded. By these things, a predetermined display function can be performed in the predetermined place S.

Therefore, according to this embodiment, even if the dye in the film substrate 1 tries to migrate to the adhesive layer 2 and the print layer 3 through the respective adhesive layers 5, it does not occur in the respective dye migration preventing layers 4. It is suppressed by the PVDC component.
Therefore, the discoloration of the adhesive layer 2 and the print layer 3 due to the migration of the dye is prevented, and thus the deterioration of the designability of the marking film due to the discoloration of the adhesive layer 2 and the print layer 3 can be avoided. . As a result, the dye can be used as a colorant without lowering the design, and the coloring power of the dye can be improved, and a more vivid design can be actually obtained.

Now, a method of manufacturing the marking film will be described. First, with respect to the film substrate 1, 30 parts by weight of DOP and 3 parts by weight of dye were kneaded into 100 parts by weight of PVC to form a film. The thickness was 50 μm. Further, the dye transfer prevention layer 4
For PVDC, a PVDC film was obtained by molding PVDC into a film having a thickness of 40 μm, and the PVDC film was dry-laminated on both surfaces of the film substrate 1 using an adhesive for dry lamination.

Then, a predetermined printing is performed on the surface (upper surface in FIG. 1) of the dye transfer preventing layer 4 on the opposite side (upper surface in FIG. 1) opposite to the film substrate 1 to form the print layer 3. . Further, an acrylic pressure-sensitive adhesive was applied on the surface (lower surface in the same figure) of the other side (lower side in the same figure) of the dye transfer prevention layer 4 opposite to the film substrate 1 to form the adhesive layer 2. . The thickness was set to 40 μm when dry. As described above, the marking film as an example of the invention can be obtained.

Further, a marking film was prepared as a comparative example for comparison with the above-mentioned invention examples. That is,
The print layer 3 and the pressure-sensitive adhesive layer 2 were directly provided on both surfaces of the film substrate 1 to obtain a marking film in which a dye migration preventing layer was not provided on either surface of the film substrate 1. .

Then, regarding the above-mentioned invention example and comparative example,
The discolored state was evaluated by the following test methods. First, each film of the invention example and the comparative example was attached to a stainless plate, and the film was heated in a gear oven at a temperature of 100 ° C. for 2 hours.
It was heated for 4 hours to accelerate the transfer of the dye. Then, the state of discoloration of each film of the invention example and the comparative example was visually evaluated.

As a result of the above, in the invention examples, no difference from the blank at the stage before the heat treatment by the gear oven was observed. Therefore, it is considered that the dye transfer hardly occurred. On the other hand, in the comparative example, a large discoloration was observed in the appearance. Therefore, it is considered that a considerable amount of dye was transferred.

In the above embodiments, an example in which the present invention is applied to a marking film has been described, but the present invention is applicable to a sticker, a coloring tape, a display tape, a display sheet, etc.
Of course, it can be applied to colored films other than marking films.

[0031]

As described above, according to the first aspect of the present invention, among the film base material containing transparent PVC as a main component and containing the dye, and both surfaces of the film base material, And a dye transfer prevention layer containing PVDC as a main component, the discoloration due to the dye of the member in contact with the portion where the dye transfer prevention layer of the film member is disposed can be prevented. As a result of being able to avoid the deterioration of the designability of the colored film due to the discoloration of the member due to, it becomes possible to include a dye without inviting the deterioration of the designability, and it is possible to improve the coloring property by the dye and to achieve a vivid color. It is possible to obtain excellent design.

According to the invention of claim 2, when the adhesive layer is provided on one surface side of the film substrate, the dye transfer preventing layer is arranged between the film substrate and the adhesive layer. Therefore, the discoloration of the adhesive layer due to the dye in the film substrate can be prevented, and thus the effect according to the invention of claim 1 can be specifically obtained.

According to the third aspect of the invention, when the adhesive layer is provided on one surface side of the film substrate and the print layer is provided on the other surface side, the migration preventing layer is provided on both sides of the film substrate. Since they are provided on the surface respectively, the discoloration of the adhesive layer and the print layer due to the dye in the film substrate can be prevented, respectively.
The effect of the invention can be specifically obtained.

According to the fourth aspect of the present invention, since the separator is attached to the surface of the adhesive layer opposite to the dye transfer prevention layer, foreign matter such as dust adheres to the adhesive layer. It is possible to prevent the adhesive strength from being lowered, facilitate the handling of the colored film, and facilitate the cutting operation.

[Brief description of drawings]

FIG. 1 is a cross-sectional view schematically showing the structure of a marking film according to an example of the present invention.

[Explanation of symbols]

 1 Film Base Material 2 Adhesive Layer (Adhesive Layer) 3 Print Layer 4 Dye Transfer Prevention Layer

Claims (4)

[Claims] 1. A film base material containing a transparent polyvinyl chloride resin as a main component and containing a dye, and a polyvinylidene chloride resin provided on at least one of both surfaces of the film base material. A colored film comprising a dye transfer prevention layer as a main component. 2. The colored film according to claim 1, wherein the dye transfer prevention layer is provided on one surface of the film base, and an adhesive layer is provided on the surface of the dye transfer prevention layer opposite to the film base. A colored film, which is provided. 3. The colored film according to claim 1, wherein the dye transfer preventing layer is provided on both surfaces of the film base material, and the adhesive is provided on the surface of the one dye transfer preventing layer opposite to the film base material. A colored film comprising a layer and a print layer provided on the surface of the other dye transfer prevention layer opposite to the film substrate. 4. The colored film according to claim 2 or 3, wherein a separator is attached to the surface of the adhesive layer opposite to the dye transfer prevention layer.